From: Liaw, Andy (firstname.lastname@example.org)
Date: Thu 13 May 2004 - 02:55:46 EST
> From: Rolf Turner
> Anne Piotet wrote:
> > What R functionnalities are there to do missing values imputation
> > (substantial proportion of missing data)? I would prefer to use
> > maximum likelihood methods ; is the EM algorithm implemented? in
> > which package?
> The so-called ``EM algorithm'' is ***NOT*** an
> algorithm. It is a methodology or a unifying concept.
> It would be impossible to ``implement'' it. (Except
> possibly by means of some extremely advanced and
> sophisticated Artificial Intelligence software.)
Yes, but EM for missing value imputation is a bit narrower, I guess. At
least the `norm' package on CRAN has em.norm() for multivariate gaussian...
> Rolf Turner
> Remail@example.com mailing list
> PLEASE do read the posting guide!
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